UNSPSC 11111811: Haydite

A type of expanded shale, slate or clay; used as an aggregate to make lightweight structural concrete

UNSPSC 11111811 Haydite, a Commodity code, encompasses cementitious stabilization and bituminous paving materials that state and local governments procure for road construction, maintenance, and resurfacing. State and local buyers are sourcing cement-treated base, cement-stabilized backfill, asphaltic concrete with and without recycled content, aggregate for surface treatments, and crushed asphalt chips—all used in the day-to-day management of regional road networks. Collin County, Texas, the predominant issuer in the recent opportunity set, has posted three parallel IFBs (road materials for cement-treated base and cement-stabilized backfill, asphaltic concrete, and aggregate for surface treatments) all due July 16, 2026, with estimated annual values of $600,000, $3 million, and undisclosed respectively. These materials conform to Texas Department of Transportation Standard Specifications for Construction and Maintenance of Highways, Streets and Bridges, 2024 Edition. Counties and municipalities across Texas, California, Georgia, Colorado, Mississippi, Nevada, and Florida are issuing IFBs and RFQs for the same material families—the City of Detroit is sourcing asphalt pick-up (Bituminous Aggregate Wearing Course 36A, 3,000 tons) under RFQ 548310 due June 29, 2026, and fine and coarse aggregates (11,000 tons total) under RFQ 546989 due June 5, 2026, both restricted to Detroit-based certified businesses. Rankin County, Mississippi, is soliciting crushed limestone aggregates and riprap for county and participating municipal operations through sealed bid 26-300-6A due May 28, 2026. Boulder County, Colorado, is procuring fractured rock chips (3,300 tons) for its chip seal program under Bid 261-26 due April 2, 2026, and has also posted a broader landscaping and erosion control materials SOQ (SOQ28626) due May 27, 2026.

The issuing-body mix spans county transportation departments, municipal public works offices, and special-purpose district authorities. Collin County and Brevard County, Florida, both appear as repeat major buyers with multi-item, multi-zone procurement strategies. Nevada Department of Transportation has issued three separate one-year open-term contracts (Districts 1, 2, and 3) for plant mix, cold mix, and bituminous base and surface aggregate, all posted in February 2026 with bid deadlines between March 9 and March 19, 2026, and Nevada-based businesses receive a five percent price preference if a majority of goods are produced in-state. Cities of Arlington, Texas; Tampa, Florida; Tucson, Arizona; Detroit, Michigan; and Thomasville, Georgia, are also issuing material procurement notices. Geographic concentration is strongest in Texas (Collin County) and Florida (Brevard County, Pinellas County School District, City of Tampa, City of Detroit), with secondary activity in California (Santa Clara County), Colorado (Boulder County), Mississippi (Rankin County), Nevada (statewide NDOT), and Georgia (Barrow County, City of Thomasville). Representative recent opportunities include Collin County IFB 2026-279 for cement treated base and cement stabilized backfill (bids due July 16, 2026, estimated annual value $600,000) and Collin County IFB 2026-280 for asphaltic concrete with and without recycled asphalt pavement and shingles (bids due July 16, 2026, estimated annual value $3 million). City of Detroit RFQ 548310 for asphalt pick-up (3,000 tons, June 29, 2026) is restricted to Detroit-based certified businesses and includes equalization preferences of 1–5 percent depending on certification type. Contract terms across the block are typically one year with renewal options of one to two additional years, and most solicitations require compliance with state DOT standard specifications, ASTM and AASHTO material testing standards, recycled-content questionnaires, and insurance covering general liability at $1 million and workers' compensation at statutory minimums.